Leather-rounding machine



' T. s. ROBERTS & J. LIPPS.

ed Dec. 4, 1888.

being in contact, so that perfectly circular UNITED STATES PATENT OFFICE.

THOMAS S. ROBERTS AND JOHN LIPPS, OF ROCKFORD, IOYVA.

LEATHER-ROUNDING MACHINE.

SPECIFICATION forming part of Letters Patent No. 393,788, dated December 4, 1888.

Application filed July 16, 1888. Serial No. 280,033. (No model.)

To all whom it may concern.- 7

Be it known that we, THOMAS S. ROBERTS and JOHN LIPPs, citizens of the United States, residing at Rockford, in the county of Floyd and State of Iowa, have invented a new and useful Improvement in Attachments to a h'easing-Machine, of which the following is a specification.

Our invention relates to an improvement in attachments for rounding leather and adapted for use on leather-creasing machines; and it consists in the peculiar construction and combination of devices, that will be more fully set forth hereinafter, and particularly pointed out in the claim.

In the accompanying drawings, Figure 1 is a side elevation of a pair of rounding-rollers embodying our improvements, showing the same attached to the shaft of a leather-creasing machine. Fig. 2 is a vertical sectional view taken on the line 00 0c of Fig. 1.

a I) represent the shafts of a machine, such as are commonly employed for creasing leather, the remainder of the machine being not shown herein, as it forms no part of our invention and is well understood by persons skilled in this art.

A 13 represent a pair of roiniding-rollers, which are detachably secured to the shafts a b, respectively, and have their peripheries in contact. The said rollers are adapted to be rotated, so that their opposing sides travel in the same direction. The upper roller, A, has a pair of annular flanges, D, which project beyond the periphery of the roller, and in the faces of the said flanges are cut grooves E, which are semicircular in cross-section. The lower roller, B, has a pair of annular grooves, O, which are deeper than the grooves E, and have their lower sides semicircular in shape, and havetheir sides vertical, as at G. The projecting flanges of the upper roller enter the vertical portions of the grooves O, as shown, the peripheries of the rollers A B passes are formed by the grooves E 0 between the contacting sides of the rollers. The flanges of the roller A hence serve to keep the grooves C E always in perfect alignment, and the centers of the passes formed by the grooves are within the groove of the lower roller; consequently the leather cannot be forced laterally between the peripheries of the rollers and seamed or scarred as it goes through the passes.

In operating our invention one end of the strap which is to be rounded is inserted in the grooves between the rollers, and the latter are caused to rotate, as before stated, the said rollers serving thereby to draw the strap between them and to round the same, as will be readily understood.

The rollers are provided each with two or more grooves, so that straps of differentsizes may be rounded.

Having thus described our invention, we clai1n The combinatiomwith the roller A, detachably secured to the shaft a, and provided with the projecting flanges D, having the grooves E, semicircular in cross-section, between them, with their outer surfaces flat and at right angles to the roller and tangential to said groove, of the roller B, detachably secured to the shaft 1), and provided with the grooves O, deeper than the grooves E, semicircular in cross-section at their bottoms, and having their sides straight outward from said crosssections, and resting against the outer surface of the flanges D, substantially as and for the purpose specified.

In testimony that we claim the foregoing as our own we have hereto affiXed our signatures in presence of two witnesses.

' THOMAS S. ROBERTS.

JOHN LIPPS.

Witnesses:

S. W. WooDHoUsE, D. G. CAMP ELL. 

